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Finding the Fourth Proportional to 115,299.78, 159,117.65 and 66,898.05

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Solution

The fourth proportional to 115,299.78, 159,117.65 and 66,898.05 is: 92,321.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,299.78 : 159,117.65 = 66,898.05 : x
  2. Step 2: Convert to fraction form
    115,299.78/159,117.65 = 66,898.05/x
  3. Step 3: Cross multiply
    115,299.78x = 159,117.65 × 66,898.05
  4. Step 4: Simplify right side
    115,299.78x = 10,644,660,505.58
  5. Step 5: Solve for x
    x = 10,644,660,505.58/115,299.78
  6. Step 6: Final answer
    x = 92,321.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.